Cavitation Erosion of Electro Spark Deposited Nitinol vs. Stellite Alloy on Stainless Steel Substrate

Abstract

The Naval Facilities Engineering and Expeditionary Warfare Center (NAVFAC EXWC) was tasked with determining the feasibility of combining Nitinol (NiTi) superelastic metal alloy with ElectroSpark Deposition (ESD) technology to increase the cavitation erosion resistance of fluid machinery utilized by the Department of Defense (DOD). EXWC examined several industrial pump materials and compared their relative cavitation erosion resistance. The ESD'd Nitinol was also examined by Differential Scanning Calorimetry (DSC) and Dilatometry (DIL) for changes in its thermo-mechanical properties due to ESD. Microscopy was conducted to examine the metallurgical bond established by the ESD process, and its subsequent erosion, per ASTM G32. As a comparison, a known erosion-resistant, weld-friendly alloy called Stellite 6(registered) was ESD'd and its cavitation erosion resistance compared to that of Nitinol.

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Document Details

Document Type
Technical Report
Publication Date
Jul 15, 2015
Accession Number
ADA636770

Entities

People

  • Daniel R. Polly
  • Lean-miguel San Pedro
  • Mikhail Arushanov
  • Theresa A. Hoffard

Organizations

  • Naval Facilities Engineering Systems Command

Tags

Communities of Interest

  • Biomedical
  • Energy and Power Technologies
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Alloys
  • Corrosion Resistance
  • Department Of Defense
  • Engineering
  • Erosion Resistance
  • Expeditionary Warfare
  • Heat Energy
  • Materials
  • Mechanical Properties
  • Microscopy
  • Modulus Of Elasticity
  • Phase Transformations
  • Resistance
  • Stainless Steel
  • Steel
  • Test Methods
  • Transition Temperature

Fields of Study

  • Materials science

Readers

  • Maritime and Naval Warfare Studies
  • Powder metallurgy of Titanium alloys.
  • Surface Engineering/Surface Coating Technology.